Pump jack



B. J. CRIST PUMP JACK April 15, 1930.

Filed Jan. 16 1928 2 Sheets-Sheet 1 A TTORNEYS.

. April 15, 1930.

V B. J. CRIST v PUMP JACK 1928 2 Sheets-Sheet 2 Filed Jan. 16

IIYVENTOR.

Ben J CD187,

ATTORNEYS.

Patented Apr. 15, 1930 PATENT QFFICE BEN J. ORIST, OF ELLSWORTH,MINNESOTA PUMP JACK Application filed January 16, 1928.

This invention relates to the class of pumps and pertains particularlyto a pump jack.

The primary object of this invention is to provide, in a manner ashereinafter set forth, (3 an improved means for mechanically operatinthe piston and piston rod of a pump of the character normally operatedby a pivoted handle or lever.

Another object of the invention is to provide, in a manner ashereinafter set forth, an improved mechanical structure for theoperation of a pump of the character above described, which can bemounted directly upon the pump casing without taking an undue amount ofspace and thereby permitting the structure to be used upon pumps whichare located in positions having small amount of surrounding room.

A further object of the invention is to provide, in a manner ashereinafter set forth, an improved pump ask which is of simple butstrong and durable construction, easily installed and comparativelyinexpensive to manufacture and set up.

Numerous other objects and advantages of this invention will becomeapparent as the description of the same proceeds and the invention willbe best understood from a con- M sideration of the following detaileddescriplion taken in connection with the accompanying drawings forming apart of this specification, with the understanding, however, that theinvention is not confined to any strict conformity with the showing ofthe drawings but may be changed or modified so long as such changes ormodifications mark no material departure from the salient features ofthe invention as expressed in the appended 3 claim.

In the drawings:

Figure 1 shows a pump in side elevation showing the jack embodying thepresent invcntion applied thereto.

Figure 2 is a front elevational view of the pump structure shown inFigure 1.

Figure 3 is a plan view of the pump ack structure embodying thisinvention.

Figure 4. is a sectional View taken upon the line of Figure 8.

Serial No. 247,169.

Figure 5 is a sectional view taken substantially upon the line 55 ofFigure 1.

Figure 6 is a sectional view taken substantially upon the line 6-6 ofFigure 2.

Figure 7 is a sectional view showing the method of connecting the crossbeam to an adjustable side bar.

Referring now to the drawings in detail wherein like numerals ofreference indicate corresponding parts throughout the several views,vthe numeral 1 indicates the body of a hand operated pump of usualconstruction, including the handle 2, pump rod 8, and nozale 4-.

The jack structure embodying the present invention comprises a cast baseor bed plate 5, a portion of one side of the plate adjacent the frontedge, extending laterally as at 6,

a depression being formed in the plate adjai cent the lateral extension(3, to provide an oil pan 7'. At the front and rear of the oil pan 7 theplate is formed to provide half bearings 8 and 9 respectively, in whichbearings a stub shaft 10 is mounted and held in place by the capbearings 11 and 12, as more clearly shown in Figure 3. Carried upon theshaft 10 between the bearings 8 and 9 is a pinion drive gear 13, theperiphery of which projects a sufficient distance beyond the adjacentside edge of the bed plate pan 7 to engage a gear hereinafter described.The outer end of this shaft carries the belt pulley 14 over which asuitable drive belt not shown) may be engaged.

Cast integral with and across the rear edge of the bed plate 5 is abearing sleeve 15 in which isinounted a shaft 16 which carries upon thatendv adjacent the edge of the bed plate beyond which the pinion gear 13project-s, a relatively large beveled gear 17 the 96 teeth of which meshwith the teeth of the pinion drivegear 13. The other end of the shaft 16carries the crank arm 18 which is provided adjacent the free end thereofwith a series of apertures 19 in Which a pin 20 may be secured. The gear17 has cast integral therewith the counter balance weight 21 which isprovided with a radially extend ing series of apertures 22 which arealigned with the apertures in the crank arm 18.

Cast with or otherwise secured to the bearing sleeye 15 is one half of aclamp collar which half is indicated by the numeral 23 with which isassociated a complemental half 24, the cars 25 of the two halves beingdrawn together by appropriate securing elements such as the bolt members26. This clamp collar is engaged about the lower portion of the pumpbody 1 as shown in Figure 1 at the proper point thereon to correspondwith the height of the supporting legs 27 formed adj a cent the forwardedge of the bed plate 5, to maintain the plate in substantiallyhorizontal position.

A suitable cover or hood 28 is provided to overlie the pinion gear 13,which hood is secured to the bed plate 5 in the manner shown. Associatedwith this hood is an upwardly extendin curved shield 29 which overlies aportion 0 the face of the gear 17 to prevent the entanglement of anyarticle in this gear.

A pair of longitudinally adjustable bars, each indicated by the numeral30, is provided, each of which comprises a lower portion 31 and an n)per portion 32, these portions being preferably of channel constructionso that each of the upper portions 32 is of smaller cross sectional areathan the lower portion and slidably engages in a lower portion in themanner shown, each of the portions being provided with longitudinallyextending series of apertures 33 which receive the bolts 34 to maintainthe bars at the desired adjusted length.

Each of the bar sections 31 has secured in the lower end thereof a clampmember 85, one of which engages the pin 20 carried by the arm 18 whilethe other engages a similar pin 26 fitted into one of the apertures 22in the gear counter balance body 21.

Each of the upper sections 32 has secured thereto a bearing 37 each ofwhich receives a trunnion pin 38 carried by and projecting from the endof a cross head 39, the bars 3( being thus connected by this cross head.A suitable retaining element such as a cotter key may be passed throughthe pins 38 as shown. The central portion of the cross head 39 is formedto provide a seat 0 for the reception of the upper end of a pump rod $1.A cap 42 is secured over the seat by the screws 13, which holds the rodin position, an additional securing element being carried by the cap inthe form of a binding screw 45 which bears against the rod as shown inFig. 6.

From the foregoing description it will be readily seen that in a pumpjack of this character a small electric or gasoline motor can beemployed to operate a pump of the character describedor any other typewherein an exppsed reciprocating pump rod is employed.

avlng thus described my invention what I claim is:

A pum jack stand comprising a horizonta ly isp'osed base plate, abearing cast BEN J. CRIST.

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